B0054 medium Severity

B0054: Second Row Center Seatbelt Sensor (Subfault)

No effect on engine drivability but may disable airbag for affected seat and illuminate restraint warnings

Overview

B0054 indicates a fault in the second row center seatbelt sensor circuit within the vehicle restraint system; common causes include sensor failure, open/shorted harness or BCM communication issues

Common Symptoms

  • Seatbelt warning light for second row center seat illuminated
  • Airbag indicator related to the seat restraint may flash or be disabled
  • B0054 code present on scan tool

Most Common Causes

Faulty second row center seatbelt sensor high

Sensor internal failure prevents correct signal to the Body Control Module

Open or shorted seatbelt sensor wiring/harness medium

Wiring damage from seat movement, abrasion, or impact can interrupt signal

Poor electrical connection/corrosion at sensor or connector medium

Moisture or corrosion may cause intermittent signals interpreted as faults

Body Control Module (BCM) communication failure low

BCM unable to correctly interpret or transmit sensor data due to internal fault

Diagnostic Steps

  1. Use an OEM or professional scan tool to retrieve B0054 and all related SRS/BCM codes
    Expected: B0054 is active; no additional unrelated codes
    Interpretation: Isolate restraint system fault before component testing
  2. Visually inspect second row center seatbelt sensor and wiring harness for damage, loose pins or corrosion
    Expected: No obvious physical damage or corrosion
    Interpretation: If damage found, repair wiring/connectors
  3. Perform continuity and resistance tests on sensor circuit with multimeter
    Expected: Resistance matches expected OEM spec (e.g., near open when unbuckled, near 0 when buckled)
    Interpretation: Out-of-spec indicates sensor or circuit fault
  4. Verify BCM communication and CAN‑bus integrity using scan tool
    Expected: BCM can communicate without errors
    Interpretation: Failed communication indicates potential control module issue
  5. Clear codes and monitor live data while buckling/unbuckling seatbelt
    Expected: Sensor signal toggles correctly
    Interpretation: If issue persists, further sensor or BCM diagnostics needed

Repair Solutions

Replace faulty second row center seatbelt sensor medium
Estimated Cost: $100 - $200

Includes part and labor; exact cost varies by vehicle

Repair or replace damaged wiring/harness/connectors medium
Estimated Cost: $50 - $150

Depends on extent of wiring damage

Replace or reprogram Body Control Module (BCM) hard
Estimated Cost: $400 - $900

Requires programming and may include additional system configuration

Common Misdiagnoses

Avoid these common diagnostic mistakes:

  • Generic body code misinterpretation as engine fault rather than body restraint sensor issue

Frequently Asked Questions

Technical definition of B0054 OBD-II Code

The B0054 code stands for Second Row Center Seatbelt Sensor (Subfault). This generally indicates an issue with the Sensors system.

Is it safe to drive with a B0054 code?

With a severity level of medium, no effect on engine drivability but may disable airbag for affected seat and illuminate restraint warnings

Symptoms associated with DTC B0054

Common symptoms include: Seatbelt warning light for second row center seat illuminated, Airbag indicator related to the seat restraint may flash or be disabled, B0054 code present on scan tool. You might also notice the Check Engine Light is on.

What causes the B0054 code?

Potential culprits include: Faulty second row center seatbelt sensor, Open or shorted seatbelt sensor wiring/harness, Poor electrical connection/corrosion at sensor or connector. A proper diagnosis is recommended.

What is the price difference for fixing B0054?

Repair costs depend on the specific failure. A simple Repair or replace damaged wiring/harness/connectors replacement is relatively affordable ($50-$150), whereas a Replace or reprogram Body Control Module (BCM) repair is more expensive, potentially reaching $900.

Does B0054 affect Ford, Toyota, or Honda?

Yes, B0054 is a generic code that applies to all OBD-II compliant vehicles, including Ford, Toyota, Honda, Chevrolet, Nissan, Dodge, BMW, and more.

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